US4365970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specimen test slide and method for testing occult blood
Assignee: SmithKline Diagnostics Inc
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Filing: 1981-05-01
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Granted: 1982-12-28
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Expires: 2001-05-01
Abstract
Abstract An improved specimen test slide having a front panel and a rear panel. The front panel has one or more openings. Sheet means carrying a test reagent underlie each of these openings for reception of a specimen. A hinged cover overlies the openings. The rear panel has flap means opposite said openings which is pivotable to expose the underside of the sheet to permit application of a developing solution. The underside of the sheet which faces the rear panel also has a control area positioned on a portion thereof at some distance from the portions of the sheet underlying the openings of the front panel. The control area contains positive and negative monitors.
Inventors
- 👤 Paul J. Lawrence
- 👤 Charles W. Townsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:50
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/726; G01N33/52; G01N33/528
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
In an occult blood specimen test slide having a front panel, a rear panel, said front panel having one or more openings, sheet means carrying a test reagent between the front and rear panels underlying each of said openings, a hinged cover adapted to overlie a portion of the front panel and said openings and flap means in the rear panel opposite said openings and pivotable to expose the underside of the sheet, the improvement comprising: an area positioned on a portion of the sheet means facing the rear panel and isolated from the openings in the front panel, said area including a positive and negative monitor, said positive and negative monitors including the test reagent and said positive monitor additionally including a compound that reacts to environmental conditions in a manner similar to hemoglobin.
Claim 2
Dependent Claim
135 words
In an occult blood specimen test slide having a front panel, a rear panel, said front panel having one or more openings, sheet means carrying a test reagent between the front and rear panels underlying each of said openings, a hinged cover adapted to overlie a portion of the front panel and said openings and flap means in the rear panel opposite said openings and pivotable to expose the underside of the sheet, the improvement comprising: an area positioned on a portion of the sheet means facing the rear panel and isolated from the openings in the front panel, said area including a positive and negative monitor, said positive and negative monitors including the test reagent and said positive monitor additionally including a compound that reacts to environmental conditions in a manner similar to hemoglobin.
Claim 3
Dependent Claim
23 words
The slide of claim 1 in which the compound in the positive monitor is a blood component and the test reagent is guaiac.
Claim 4
Dependent Claim
12 words
The slide of claim 2 in which the blood component is hemin.
Claim 5
Dependent Claim
20 words
The slide of claim 2 in which the positive and negative monitors are framed by a brightly colored inert border.
Claim 6
Dependent Claim
146 words
In a method for determining the presence of occult blood on a specimen test slide having a guaiac treated specimen receiving sheet between a front panel and a rear panel with openings in the front and rear panels and pivotable covers to cover said openings which consists of smearing fecal matter onto the guaiac sheet through an opening of the front panel and applying a developing solution to the guaiac sheet at the corresponding opening in the rear panel the improvement which comprises further applying the developing solution to an area positioned on a portion of the sheet facing the rear panel and isolated from the openings in the front panel, said area including a positive and negative monitor, said positive and negative monitors including the guaic and said positive monitor additionally including a compound that reacts to environmental conditions in a manner similar to hemoglobin.
Claim 7
Dependent Claim
146 words
In a method for determining the presence of occult blood on a specimen test slide having a guaiac treated specimen receiving sheet between a front panel and a rear panel with openings in the front and rear panels and pivotable covers to cover said openings which consists of smearing fecal matter onto the guaiac sheet through an opening of the front panel and applying a developing solution to the guaiac sheet at the corresponding opening in the rear panel the improvement which comprises further applying the developing solution to an area positioned on a portion of the sheet facing the rear panel and isolated from the openings in the front panel, said area including a positive and negative monitor, said positive and negative monitors including the guaic and said positive monitor additionally including a compound that reacts to environmental conditions in a manner similar to hemoglobin.
References Cited (Backward Citations)
US3853468A
Cited
US3838012A
Cited
US3996006A
Cited
US3986834A
Cited
US4225557A
Cited
US4175923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |